diff --git a/harfbuzz.spec b/harfbuzz.spec
index f62d644..776774f 100644
--- a/harfbuzz.spec
+++ b/harfbuzz.spec
@@ -1,5 +1,5 @@
 Name:          harfbuzz
-Version:       2.9.0
+Version:       2.9.1
 Release:       1mamba
 Summary:       An OpenType text shaping library
 Group:         System/Libraries
@@ -11,20 +11,14 @@ Source:        https://github.com/harfbuzz/harfbuzz/releases/download/%{version}
 #Source:        http://www.freedesktop.org/software/harfbuzz/release/harfbuzz-%{version}.tar.xz
 License:       MIT
 ## AUTOBUILDREQ-BEGIN
-#libpthread.so.0()(64bit): /usr/lib64/libpthread.so: file not owned by any package
 BuildRequires: glibc-devel
-BuildRequires: libbrotli-devel
-BuildRequires: libbzip2-devel
 BuildRequires: libcairo-devel
 BuildRequires: libfreetype-devel
 BuildRequires: libgcc
 BuildRequires: libglib-devel
 BuildRequires: libgraphite2-devel
 BuildRequires: libicu-devel
-BuildRequires: libpcre-devel
-BuildRequires: libpng-devel
 BuildRequires: libstdc++6-devel
-BuildRequires: libz-devel
 ## AUTOBUILDREQ-END
 BuildRequires: libicu-devel >= 50
 Requires:      lib%{name} = %{?epoch:%epoch:}%{version}-%{release}
@@ -122,6 +116,9 @@ This package includes the %{name} API documentation.
 %{_datadir}/gtk-doc/html/harfbuzz/*
 
 %changelog
+* Wed Sep 08 2021 Automatic Build System <autodist@mambasoft.it> 2.9.1-1mamba
+- automatic version update by autodist
+
 * Fri Aug 20 2021 Automatic Build System <autodist@mambasoft.it> 2.9.0-1mamba
 - automatic version update by autodist